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1da177e4 LT |
1 | /* |
2 | * arch/s390/kernel/head.S | |
3 | * | |
0ad775db HC |
4 | * (C) Copyright IBM Corp. 1999, 2005 |
5 | * | |
6 | * Author(s): Hartmut Penner <hp@de.ibm.com> | |
7 | * Martin Schwidefsky <schwidefsky@de.ibm.com> | |
8 | * Rob van der Heij <rvdhei@iae.nl> | |
9 | * Heiko Carstens <heiko.carstens@de.ibm.com> | |
1da177e4 LT |
10 | * |
11 | * There are 5 different IPL methods | |
12 | * 1) load the image directly into ram at address 0 and do an PSW restart | |
13 | * 2) linload will load the image from address 0x10000 to memory 0x10000 | |
14 | * and start the code thru LPSW 0x0008000080010000 (VM only, deprecated) | |
15 | * 3) generate the tape ipl header, store the generated image on a tape | |
16 | * and ipl from it | |
17 | * In case of SL tape you need to IPL 5 times to get past VOL1 etc | |
18 | * 4) generate the vm reader ipl header, move the generated image to the | |
19 | * VM reader (use option NOH!) and do a ipl from reader (VM only) | |
20 | * 5) direct call of start by the SALIPL loader | |
21 | * We use the cpuid to distinguish between VM and native ipl | |
22 | * params for kernel are pushed to 0x10400 (see setup.h) | |
0ad775db | 23 | * |
1da177e4 LT |
24 | */ |
25 | ||
26 | #include <linux/config.h> | |
27 | #include <asm/setup.h> | |
28 | #include <asm/lowcore.h> | |
0013a854 | 29 | #include <asm/asm-offsets.h> |
1da177e4 LT |
30 | #include <asm/thread_info.h> |
31 | #include <asm/page.h> | |
32 | ||
347a8dc3 | 33 | #ifdef CONFIG_64BIT |
0ad775db HC |
34 | #define ARCH_OFFSET 4 |
35 | #else | |
36 | #define ARCH_OFFSET 0 | |
37 | #endif | |
38 | ||
1da177e4 LT |
39 | #ifndef CONFIG_IPL |
40 | .org 0 | |
41 | .long 0x00080000,0x80000000+startup # Just a restart PSW | |
42 | #else | |
43 | #ifdef CONFIG_IPL_TAPE | |
44 | #define IPL_BS 1024 | |
45 | .org 0 | |
46 | .long 0x00080000,0x80000000+iplstart # The first 24 bytes are loaded | |
47 | .long 0x27000000,0x60000001 # by ipl to addresses 0-23. | |
48 | .long 0x02000000,0x20000000+IPL_BS # (a PSW and two CCWs). | |
49 | .long 0x00000000,0x00000000 # external old psw | |
50 | .long 0x00000000,0x00000000 # svc old psw | |
51 | .long 0x00000000,0x00000000 # program check old psw | |
52 | .long 0x00000000,0x00000000 # machine check old psw | |
53 | .long 0x00000000,0x00000000 # io old psw | |
54 | .long 0x00000000,0x00000000 | |
55 | .long 0x00000000,0x00000000 | |
56 | .long 0x00000000,0x00000000 | |
57 | .long 0x000a0000,0x00000058 # external new psw | |
58 | .long 0x000a0000,0x00000060 # svc new psw | |
59 | .long 0x000a0000,0x00000068 # program check new psw | |
60 | .long 0x000a0000,0x00000070 # machine check new psw | |
61 | .long 0x00080000,0x80000000+.Lioint # io new psw | |
62 | ||
63 | .org 0x100 | |
64 | # | |
65 | # subroutine for loading from tape | |
66 | # Paramters: | |
67 | # R1 = device number | |
68 | # R2 = load address | |
69 | .Lloader: | |
70 | st %r14,.Lldret | |
71 | la %r3,.Lorbread # r3 = address of orb | |
72 | la %r5,.Lirb # r5 = address of irb | |
73 | st %r2,.Lccwread+4 # initialize CCW data addresses | |
74 | lctl %c6,%c6,.Lcr6 | |
75 | slr %r2,%r2 | |
76 | .Lldlp: | |
77 | la %r6,3 # 3 retries | |
78 | .Lssch: | |
79 | ssch 0(%r3) # load chunk of IPL_BS bytes | |
80 | bnz .Llderr | |
81 | .Lw4end: | |
82 | bas %r14,.Lwait4io | |
83 | tm 8(%r5),0x82 # do we have a problem ? | |
84 | bnz .Lrecov | |
85 | slr %r7,%r7 | |
86 | icm %r7,3,10(%r5) # get residual count | |
87 | lcr %r7,%r7 | |
88 | la %r7,IPL_BS(%r7) # IPL_BS-residual=#bytes read | |
89 | ar %r2,%r7 # add to total size | |
90 | tm 8(%r5),0x01 # found a tape mark ? | |
91 | bnz .Ldone | |
92 | l %r0,.Lccwread+4 # update CCW data addresses | |
93 | ar %r0,%r7 | |
94 | st %r0,.Lccwread+4 | |
95 | b .Lldlp | |
96 | .Ldone: | |
97 | l %r14,.Lldret | |
98 | br %r14 # r2 contains the total size | |
99 | .Lrecov: | |
100 | bas %r14,.Lsense # do the sensing | |
101 | bct %r6,.Lssch # dec. retry count & branch | |
102 | b .Llderr | |
103 | # | |
104 | # Sense subroutine | |
105 | # | |
106 | .Lsense: | |
107 | st %r14,.Lsnsret | |
108 | la %r7,.Lorbsense | |
109 | ssch 0(%r7) # start sense command | |
110 | bnz .Llderr | |
111 | bas %r14,.Lwait4io | |
112 | l %r14,.Lsnsret | |
113 | tm 8(%r5),0x82 # do we have a problem ? | |
114 | bnz .Llderr | |
115 | br %r14 | |
116 | # | |
117 | # Wait for interrupt subroutine | |
118 | # | |
119 | .Lwait4io: | |
120 | lpsw .Lwaitpsw | |
121 | .Lioint: | |
122 | c %r1,0xb8 # compare subchannel number | |
123 | bne .Lwait4io | |
124 | tsch 0(%r5) | |
125 | slr %r0,%r0 | |
126 | tm 8(%r5),0x82 # do we have a problem ? | |
127 | bnz .Lwtexit | |
128 | tm 8(%r5),0x04 # got device end ? | |
129 | bz .Lwait4io | |
130 | .Lwtexit: | |
131 | br %r14 | |
132 | .Llderr: | |
133 | lpsw .Lcrash | |
134 | ||
135 | .align 8 | |
136 | .Lorbread: | |
137 | .long 0x00000000,0x0080ff00,.Lccwread | |
138 | .align 8 | |
139 | .Lorbsense: | |
140 | .long 0x00000000,0x0080ff00,.Lccwsense | |
141 | .align 8 | |
142 | .Lccwread: | |
143 | .long 0x02200000+IPL_BS,0x00000000 | |
144 | .Lccwsense: | |
145 | .long 0x04200001,0x00000000 | |
146 | .Lwaitpsw: | |
147 | .long 0x020a0000,0x80000000+.Lioint | |
148 | ||
149 | .Lirb: .long 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 | |
150 | .Lcr6: .long 0xff000000 | |
151 | .align 8 | |
152 | .Lcrash:.long 0x000a0000,0x00000000 | |
153 | .Lldret:.long 0 | |
154 | .Lsnsret: .long 0 | |
155 | #endif /* CONFIG_IPL_TAPE */ | |
156 | ||
157 | #ifdef CONFIG_IPL_VM | |
158 | #define IPL_BS 0x730 | |
159 | .org 0 | |
160 | .long 0x00080000,0x80000000+iplstart # The first 24 bytes are loaded | |
161 | .long 0x02000018,0x60000050 # by ipl to addresses 0-23. | |
162 | .long 0x02000068,0x60000050 # (a PSW and two CCWs). | |
163 | .fill 80-24,1,0x40 # bytes 24-79 are discarded !! | |
164 | .long 0x020000f0,0x60000050 # The next 160 byte are loaded | |
165 | .long 0x02000140,0x60000050 # to addresses 0x18-0xb7 | |
166 | .long 0x02000190,0x60000050 # They form the continuation | |
167 | .long 0x020001e0,0x60000050 # of the CCW program started | |
168 | .long 0x02000230,0x60000050 # by ipl and load the range | |
169 | .long 0x02000280,0x60000050 # 0x0f0-0x730 from the image | |
170 | .long 0x020002d0,0x60000050 # to the range 0x0f0-0x730 | |
171 | .long 0x02000320,0x60000050 # in memory. At the end of | |
172 | .long 0x02000370,0x60000050 # the channel program the PSW | |
173 | .long 0x020003c0,0x60000050 # at location 0 is loaded. | |
174 | .long 0x02000410,0x60000050 # Initial processing starts | |
175 | .long 0x02000460,0x60000050 # at 0xf0 = iplstart. | |
176 | .long 0x020004b0,0x60000050 | |
177 | .long 0x02000500,0x60000050 | |
178 | .long 0x02000550,0x60000050 | |
179 | .long 0x020005a0,0x60000050 | |
180 | .long 0x020005f0,0x60000050 | |
181 | .long 0x02000640,0x60000050 | |
182 | .long 0x02000690,0x60000050 | |
183 | .long 0x020006e0,0x20000050 | |
184 | ||
185 | .org 0xf0 | |
186 | # | |
187 | # subroutine for loading cards from the reader | |
188 | # | |
189 | .Lloader: | |
190 | la %r3,.Lorb # r2 = address of orb into r2 | |
191 | la %r5,.Lirb # r4 = address of irb | |
192 | la %r6,.Lccws | |
193 | la %r7,20 | |
194 | .Linit: | |
195 | st %r2,4(%r6) # initialize CCW data addresses | |
196 | la %r2,0x50(%r2) | |
197 | la %r6,8(%r6) | |
198 | bct 7,.Linit | |
199 | ||
200 | lctl %c6,%c6,.Lcr6 # set IO subclass mask | |
201 | slr %r2,%r2 | |
202 | .Lldlp: | |
203 | ssch 0(%r3) # load chunk of 1600 bytes | |
204 | bnz .Llderr | |
205 | .Lwait4irq: | |
0ad775db | 206 | mvc 0x78(8),.Lnewpsw # set up IO interrupt psw |
1da177e4 LT |
207 | lpsw .Lwaitpsw |
208 | .Lioint: | |
209 | c %r1,0xb8 # compare subchannel number | |
210 | bne .Lwait4irq | |
211 | tsch 0(%r5) | |
212 | ||
213 | slr %r0,%r0 | |
214 | ic %r0,8(%r5) # get device status | |
215 | chi %r0,8 # channel end ? | |
216 | be .Lcont | |
217 | chi %r0,12 # channel end + device end ? | |
218 | be .Lcont | |
219 | ||
220 | l %r0,4(%r5) | |
221 | s %r0,8(%r3) # r0/8 = number of ccws executed | |
222 | mhi %r0,10 # *10 = number of bytes in ccws | |
223 | lh %r3,10(%r5) # get residual count | |
224 | sr %r0,%r3 # #ccws*80-residual=#bytes read | |
225 | ar %r2,%r0 | |
226 | ||
227 | br %r14 # r2 contains the total size | |
228 | ||
229 | .Lcont: | |
230 | ahi %r2,0x640 # add 0x640 to total size | |
231 | la %r6,.Lccws | |
232 | la %r7,20 | |
233 | .Lincr: | |
234 | l %r0,4(%r6) # update CCW data addresses | |
235 | ahi %r0,0x640 | |
236 | st %r0,4(%r6) | |
237 | ahi %r6,8 | |
238 | bct 7,.Lincr | |
239 | ||
240 | b .Lldlp | |
241 | .Llderr: | |
242 | lpsw .Lcrash | |
243 | ||
244 | .align 8 | |
245 | .Lorb: .long 0x00000000,0x0080ff00,.Lccws | |
246 | .Lirb: .long 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 | |
247 | .Lcr6: .long 0xff000000 | |
248 | .Lloadp:.long 0,0 | |
249 | .align 8 | |
250 | .Lcrash:.long 0x000a0000,0x00000000 | |
251 | .Lnewpsw: | |
252 | .long 0x00080000,0x80000000+.Lioint | |
253 | .Lwaitpsw: | |
254 | .long 0x020a0000,0x80000000+.Lioint | |
255 | ||
256 | .align 8 | |
257 | .Lccws: .rept 19 | |
258 | .long 0x02600050,0x00000000 | |
259 | .endr | |
260 | .long 0x02200050,0x00000000 | |
261 | #endif /* CONFIG_IPL_VM */ | |
262 | ||
263 | iplstart: | |
264 | lh %r1,0xb8 # test if subchannel number | |
265 | bct %r1,.Lnoload # is valid | |
266 | l %r1,0xb8 # load ipl subchannel number | |
267 | la %r2,IPL_BS # load start address | |
268 | bas %r14,.Lloader # load rest of ipl image | |
269 | l %r12,.Lparm # pointer to parameter area | |
0ad775db | 270 | st %r1,IPL_DEVICE+ARCH_OFFSET-PARMAREA(%r12) # save ipl device number |
1da177e4 LT |
271 | |
272 | # | |
273 | # load parameter file from ipl device | |
274 | # | |
275 | .Lagain1: | |
0ad775db | 276 | l %r2,INITRD_START+ARCH_OFFSET-PARMAREA(%r12) # ramdisk loc. is temp |
1da177e4 LT |
277 | bas %r14,.Lloader # load parameter file |
278 | ltr %r2,%r2 # got anything ? | |
279 | bz .Lnopf | |
280 | chi %r2,895 | |
281 | bnh .Lnotrunc | |
282 | la %r2,895 | |
283 | .Lnotrunc: | |
0ad775db | 284 | l %r4,INITRD_START+ARCH_OFFSET-PARMAREA(%r12) |
1da177e4 LT |
285 | clc 0(3,%r4),.L_hdr # if it is HDRx |
286 | bz .Lagain1 # skip dataset header | |
287 | clc 0(3,%r4),.L_eof # if it is EOFx | |
288 | bz .Lagain1 # skip dateset trailer | |
289 | la %r5,0(%r4,%r2) | |
290 | lr %r3,%r2 | |
291 | .Lidebc: | |
292 | tm 0(%r5),0x80 # high order bit set ? | |
293 | bo .Ldocv # yes -> convert from EBCDIC | |
294 | ahi %r5,-1 | |
295 | bct %r3,.Lidebc | |
296 | b .Lnocv | |
297 | .Ldocv: | |
298 | l %r3,.Lcvtab | |
299 | tr 0(256,%r4),0(%r3) # convert parameters to ascii | |
300 | tr 256(256,%r4),0(%r3) | |
301 | tr 512(256,%r4),0(%r3) | |
302 | tr 768(122,%r4),0(%r3) | |
303 | .Lnocv: la %r3,COMMAND_LINE-PARMAREA(%r12) # load adr. of command line | |
304 | mvc 0(256,%r3),0(%r4) | |
305 | mvc 256(256,%r3),256(%r4) | |
306 | mvc 512(256,%r3),512(%r4) | |
307 | mvc 768(122,%r3),768(%r4) | |
308 | slr %r0,%r0 | |
309 | b .Lcntlp | |
310 | .Ldelspc: | |
311 | ic %r0,0(%r2,%r3) | |
312 | chi %r0,0x20 # is it a space ? | |
313 | be .Lcntlp | |
314 | ahi %r2,1 | |
315 | b .Leolp | |
316 | .Lcntlp: | |
317 | brct %r2,.Ldelspc | |
318 | .Leolp: | |
319 | slr %r0,%r0 | |
320 | stc %r0,0(%r2,%r3) # terminate buffer | |
321 | .Lnopf: | |
322 | ||
323 | # | |
324 | # load ramdisk from ipl device | |
325 | # | |
326 | .Lagain2: | |
0ad775db | 327 | l %r2,INITRD_START+ARCH_OFFSET-PARMAREA(%r12) # addr of ramdisk |
1da177e4 | 328 | bas %r14,.Lloader # load ramdisk |
0ad775db | 329 | st %r2,INITRD_SIZE+ARCH_OFFSET-PARMAREA(%r12) # store size of ramdisk |
1da177e4 LT |
330 | ltr %r2,%r2 |
331 | bnz .Lrdcont | |
0ad775db | 332 | st %r2,INITRD_START+ARCH_OFFSET-PARMAREA(%r12) # no ramdisk found |
1da177e4 | 333 | .Lrdcont: |
0ad775db | 334 | l %r2,INITRD_START+ARCH_OFFSET-PARMAREA(%r12) |
1da177e4 LT |
335 | |
336 | clc 0(3,%r2),.L_hdr # skip HDRx and EOFx | |
337 | bz .Lagain2 | |
338 | clc 0(3,%r2),.L_eof | |
339 | bz .Lagain2 | |
340 | ||
341 | #ifdef CONFIG_IPL_VM | |
342 | # | |
343 | # reset files in VM reader | |
344 | # | |
345 | stidp __LC_CPUID # store cpuid | |
346 | tm __LC_CPUID,0xff # running VM ? | |
347 | bno .Lnoreset | |
348 | la %r2,.Lreset | |
349 | lhi %r3,26 | |
2b071886 | 350 | diag %r2,%r3,8 |
350e3ade HC |
351 | la %r5,.Lirb |
352 | stsch 0(%r5) # check if irq is pending | |
353 | tm 30(%r5),0x0f # by verifying if any of the | |
354 | bnz .Lwaitforirq # activity or status control | |
355 | tm 31(%r5),0xff # bits is set in the schib | |
356 | bz .Lnoreset | |
357 | .Lwaitforirq: | |
2b071886 HC |
358 | mvc 0x78(8),.Lrdrnewpsw # set up IO interrupt psw |
359 | .Lwaitrdrirq: | |
360 | lpsw .Lrdrwaitpsw | |
361 | .Lrdrint: | |
362 | c %r1,0xb8 # compare subchannel number | |
363 | bne .Lwaitrdrirq | |
364 | la %r5,.Lirb | |
365 | tsch 0(%r5) | |
1da177e4 | 366 | .Lnoreset: |
2b071886 HC |
367 | b .Lnoload |
368 | ||
369 | .align 8 | |
370 | .Lrdrnewpsw: | |
371 | .long 0x00080000,0x80000000+.Lrdrint | |
372 | .Lrdrwaitpsw: | |
373 | .long 0x020a0000,0x80000000+.Lrdrint | |
1da177e4 | 374 | #endif |
2b071886 | 375 | |
1da177e4 LT |
376 | # |
377 | # everything loaded, go for it | |
378 | # | |
379 | .Lnoload: | |
380 | l %r1,.Lstartup | |
381 | br %r1 | |
382 | ||
383 | .Lparm: .long PARMAREA | |
384 | .Lstartup: .long startup | |
385 | .Lcvtab:.long _ebcasc # ebcdic to ascii table | |
386 | .Lreset:.byte 0xc3,0xc8,0xc1,0xd5,0xc7,0xc5,0x40,0xd9,0xc4,0xd9,0x40 | |
387 | .byte 0xc1,0xd3,0xd3,0x40,0xd2,0xc5,0xc5,0xd7,0x40,0xd5,0xd6 | |
388 | .byte 0xc8,0xd6,0xd3,0xc4 # "change rdr all keep nohold" | |
389 | .L_eof: .long 0xc5d6c600 /* C'EOF' */ | |
390 | .L_hdr: .long 0xc8c4d900 /* C'HDR' */ | |
391 | ||
392 | #endif /* CONFIG_IPL */ | |
393 | ||
394 | # | |
395 | # SALIPL loader support. Based on a patch by Rob van der Heij. | |
396 | # This entry point is called directly from the SALIPL loader and | |
397 | # doesn't need a builtin ipl record. | |
398 | # | |
399 | .org 0x800 | |
400 | .globl start | |
401 | start: | |
402 | stm %r0,%r15,0x07b0 # store registers | |
403 | basr %r12,%r0 | |
404 | .base: | |
405 | l %r11,.parm | |
406 | l %r8,.cmd # pointer to command buffer | |
407 | ||
408 | ltr %r9,%r9 # do we have SALIPL parameters? | |
409 | bp .sk8x8 | |
410 | ||
411 | mvc 0(64,%r8),0x00b0 # copy saved registers | |
412 | xc 64(240-64,%r8),0(%r8) # remainder of buffer | |
413 | tr 0(64,%r8),.lowcase | |
414 | b .gotr | |
415 | .sk8x8: | |
416 | mvc 0(240,%r8),0(%r9) # copy iplparms into buffer | |
417 | .gotr: | |
418 | l %r10,.tbl # EBCDIC to ASCII table | |
419 | tr 0(240,%r8),0(%r10) | |
420 | stidp __LC_CPUID # Are we running on VM maybe | |
421 | cli __LC_CPUID,0xff | |
422 | bnz .test | |
423 | .long 0x83300060 # diag 3,0,x'0060' - storage size | |
424 | b .done | |
425 | .test: | |
426 | mvc 0x68(8),.pgmnw # set up pgm check handler | |
427 | l %r2,.fourmeg | |
428 | lr %r3,%r2 | |
429 | bctr %r3,%r0 # 4M-1 | |
430 | .loop: iske %r0,%r3 | |
431 | ar %r3,%r2 | |
432 | .pgmx: | |
433 | sr %r3,%r2 | |
434 | la %r3,1(%r3) | |
435 | .done: | |
436 | l %r1,.memsize | |
0ad775db | 437 | st %r3,ARCH_OFFSET(%r1) |
1da177e4 | 438 | slr %r0,%r0 |
0ad775db HC |
439 | st %r0,INITRD_SIZE+ARCH_OFFSET-PARMAREA(%r11) |
440 | st %r0,INITRD_START+ARCH_OFFSET-PARMAREA(%r11) | |
1da177e4 LT |
441 | j startup # continue with startup |
442 | .tbl: .long _ebcasc # translate table | |
443 | .cmd: .long COMMAND_LINE # address of command line buffer | |
444 | .parm: .long PARMAREA | |
445 | .memsize: .long memory_size | |
446 | .fourmeg: .long 0x00400000 # 4M | |
447 | .pgmnw: .long 0x00080000,.pgmx | |
448 | .lowcase: | |
449 | .byte 0x00,0x01,0x02,0x03,0x04,0x05,0x06,0x07 | |
450 | .byte 0x08,0x09,0x0a,0x0b,0x0c,0x0d,0x0e,0x0f | |
451 | .byte 0x10,0x11,0x12,0x13,0x14,0x15,0x16,0x17 | |
452 | .byte 0x18,0x19,0x1a,0x1b,0x1c,0x1d,0x1e,0x1f | |
453 | .byte 0x20,0x21,0x22,0x23,0x24,0x25,0x26,0x27 | |
454 | .byte 0x28,0x29,0x2a,0x2b,0x2c,0x2d,0x2e,0x2f | |
455 | .byte 0x30,0x31,0x32,0x33,0x34,0x35,0x36,0x37 | |
456 | .byte 0x38,0x39,0x3a,0x3b,0x3c,0x3d,0x3e,0x3f | |
457 | .byte 0x40,0x41,0x42,0x43,0x44,0x45,0x46,0x47 | |
458 | .byte 0x48,0x49,0x4a,0x4b,0x4c,0x4d,0x4e,0x4f | |
459 | .byte 0x50,0x51,0x52,0x53,0x54,0x55,0x56,0x57 | |
460 | .byte 0x58,0x59,0x5a,0x5b,0x5c,0x5d,0x5e,0x5f | |
461 | .byte 0x60,0x61,0x62,0x63,0x64,0x65,0x66,0x67 | |
462 | .byte 0x68,0x69,0x6a,0x6b,0x6c,0x6d,0x6e,0x6f | |
463 | .byte 0x70,0x71,0x72,0x73,0x74,0x75,0x76,0x77 | |
464 | .byte 0x78,0x79,0x7a,0x7b,0x7c,0x7d,0x7e,0x7f | |
465 | ||
466 | .byte 0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87 | |
467 | .byte 0x88,0x89,0x8a,0x8b,0x8c,0x8d,0x8e,0x8f | |
468 | .byte 0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97 | |
469 | .byte 0x98,0x99,0x9a,0x9b,0x9c,0x9d,0x9e,0x9f | |
470 | .byte 0xa0,0xa1,0xa2,0xa3,0xa4,0xa5,0xa6,0xa7 | |
471 | .byte 0xa8,0xa9,0xaa,0xab,0xac,0xad,0xae,0xaf | |
472 | .byte 0xb0,0xb1,0xb2,0xb3,0xb4,0xb5,0xb6,0xb7 | |
473 | .byte 0xb8,0xb9,0xba,0xbb,0xbc,0xbd,0xbe,0xbf | |
474 | .byte 0xc0,0x81,0x82,0x83,0x84,0x85,0x86,0x87 # .abcdefg | |
475 | .byte 0x88,0x89,0xca,0xcb,0xcc,0xcd,0xce,0xcf # hi | |
476 | .byte 0xd0,0x91,0x92,0x93,0x94,0x95,0x96,0x97 # .jklmnop | |
477 | .byte 0x98,0x99,0xda,0xdb,0xdc,0xdd,0xde,0xdf # qr | |
478 | .byte 0xe0,0xe1,0xa2,0xa3,0xa4,0xa5,0xa6,0xa7 # ..stuvwx | |
479 | .byte 0xa8,0xa9,0xea,0xeb,0xec,0xed,0xee,0xef # yz | |
480 | .byte 0xf0,0xf1,0xf2,0xf3,0xf4,0xf5,0xf6,0xf7 | |
481 | .byte 0xf8,0xf9,0xfa,0xfb,0xfc,0xfd,0xfe,0xff | |
482 | ||
0ad775db | 483 | .macro GET_IPL_DEVICE |
1e8e3383 HC |
484 | .Lget_ipl_device: |
485 | basr %r12,0 | |
0ad775db | 486 | .LGID: l %r1,0xb8 # get sid |
1e8e3383 HC |
487 | sll %r1,15 # test if subchannel is enabled |
488 | srl %r1,31 | |
489 | ltr %r1,%r1 | |
490 | bz 0(%r14) # subchannel disabled | |
491 | l %r1,0xb8 | |
0ad775db | 492 | la %r5,.Lipl_schib-.LGID(%r12) |
1e8e3383 HC |
493 | stsch 0(%r5) # get schib of subchannel |
494 | bnz 0(%r14) # schib not available | |
495 | tm 5(%r5),0x01 # devno valid? | |
496 | bno 0(%r14) | |
0ad775db | 497 | la %r6,ipl_parameter_flags-.LGID(%r12) |
1e8e3383 | 498 | oi 3(%r6),0x01 # set flag |
0ad775db | 499 | la %r2,ipl_devno-.LGID(%r12) |
1e8e3383 HC |
500 | mvc 0(2,%r2),6(%r5) # store devno |
501 | tm 4(%r5),0x80 # qdio capable device? | |
502 | bno 0(%r14) | |
503 | oi 3(%r6),0x02 # set flag | |
504 | ||
505 | # copy ipl parameters | |
506 | ||
507 | lhi %r0,4096 | |
508 | l %r2,20(%r0) # get address of parameter list | |
509 | lhi %r3,IPL_PARMBLOCK_ORIGIN | |
510 | st %r3,20(%r0) | |
511 | lhi %r4,1 | |
512 | cr %r2,%r3 # start parameters < destination ? | |
513 | jl 0f | |
514 | lhi %r1,1 # copy direction is upwards | |
515 | j 1f | |
516 | 0: lhi %r1,-1 # copy direction is downwards | |
517 | ar %r2,%r0 | |
518 | ar %r3,%r0 | |
519 | ar %r2,%r1 | |
520 | ar %r3,%r1 | |
521 | 1: mvc 0(1,%r3),0(%r2) # finally copy ipl parameters | |
522 | ar %r3,%r1 | |
523 | ar %r2,%r1 | |
524 | sr %r0,%r4 | |
525 | jne 1b | |
526 | b 0(%r14) | |
527 | ||
528 | .align 4 | |
529 | .Lipl_schib: | |
530 | .rept 13 | |
531 | .long 0 | |
532 | .endr | |
533 | ||
534 | .globl ipl_parameter_flags | |
535 | ipl_parameter_flags: | |
536 | .long 0 | |
537 | .globl ipl_devno | |
538 | ipl_devno: | |
539 | .word 0 | |
0ad775db | 540 | .endm |
1e8e3383 | 541 | |
347a8dc3 | 542 | #ifdef CONFIG_64BIT |
0ad775db HC |
543 | #include "head64.S" |
544 | #else | |
545 | #include "head31.S" | |
1da177e4 | 546 | #endif |